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Dataset from the analysis of dielectric study for nematic liquid crystals that form enantiotropic ferroelectric nematic phase

Version 1.0

Kocot, Antoni; Karcz, Jakub; Rychłowicz, Natan; Czarnecka, Małgorzata; Herman, Jakub; Kula, Przemysław, 2024, "Dataset from the analysis of dielectric study for nematic liquid crystals that form enantiotropic ferroelectric nematic phase", https://doi.org/10.18150/YKWIQQ, RepOD, V1

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Description

This dataset contains raw data from the analyses published in the article entitled:. Karcz J., Rychłowicz N., Czarnecka M., Kocot A., Herman J., Kula P (2023). Enantiotropic ferroelectric nematic phase in a single compound. Chemical Communications 59, 14807-14810. The data include the raw dielectric spectra for ferro-nematogens JK3, and JK103 as a function of temperature and frequencies of the measuring field (frequencies from 10 to 1.3× 107 Hz). The files from dielectric measurements are in a file with the extension data. The individual file denotes the measurement at a particular temperature, the first column contains the frequencies, the second the real permittivity, and the third the imaginary part of permittivity. Temperatures in kelvins are given in the header of the column. The dataset JK103_IR contains results of polarised absorbance in the mid-infrared range for temperature ran (heating and cooling) cover the temperature range of nematic, ferroelectric nematic, twist-bent nematic and smectic phases.The attached files are labeled with the sample name and polarization and temperature.

(2024-03)
Subject
Chemistry; Engineering
Keyword

dielectric spectroscopy, infrared spectroscopy, intermolecular interactions, liquid crystals

Related Publication

Karcz J., Rychłowicz N., Czarnecka M., Kocot A., Herman J., Kula P (2023). Enantiotropic ferroelectric nematic phase in a single compound. Chemical Communications 59, 14807-14810. https://doi.org/10.1039/D3CC04296K doi: 10.1039/D3CC04296K

CC0 Creative Commons Zero 1.0 CC0 Creative Commons Zero 1.0

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JK103_RD.zip
ZIP Archive - 863.4 KB - Mar 21, 2024 - 2 Downloads
MD5: 411e7786a26858246bc2757efec37214
License: CC0 Creative Commons Zero 1.0
The catalogue contains the raw dielectric data for ferro-nematogens JK103. Molecular structure of the studied here material, 4'-(difluoro(3,4,5-trifluorophenoxy)methyl)-2,3',5'- trifluoro-[1,1'-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl)benzoate, referred to later as MUT_JK103, synthesized at Liquid Crystal group of the Military University of Technology is based on DIO – one of the model ferro-nematogens. Dielectric spectra as a function of temperature and frequencies of the measuring field (frequencies from 10 to 1.3× 107 Hz). Dielectric spectra are in files with the extension data. The individual file denotes the measurement at a particular temperature, the first column contains the frequencies, the second the real permittivity, and the third the imaginary permittivity. These measurements were performed using two impedance network analysers, specifically the HP4I92A and HP4I95A. Data are for a homeotropic aligned sample.
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JK103_IR.zip
ZIP Archive - 251.9 MB - Mar 21, 2024 - 1 Download
MD5: 24a639a19a834e49faea75da6cb6cccf
License: CC0 Creative Commons Zero 1.0
JK103_IR The catalogue contains the raw spectroscopic data of the absorbance components for ferro-nematogens JK103. Molecular structure of the material, 4'-(difluoro(3,4,5-trifluorophenoxy) methyl)- 2,3',5'- trifluoro-[1,1'-biphenyl]-4-yl 2,6-difluoro-4-(5-propyl-1,3-dioxan-2-yl)benzoate, referred to later as MUT_JK103, synthesized at Liquid Crystal group of the Military University of Technology is based on DIO – one of the model ferro-nematogens. Spectroscopic data are saved in “bsp” format most popular for presenting spectroscopic data. Info in the “property browse bar” delivers polarisation (P=0 or P=90 of the beam with respect of the alignment and “T” temperature of the sample on the heating and cooling cycle. Data are collected for a planar-aligned sample.
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JK3_RD.zip
ZIP Archive - 1.6 MB - Mar 21, 2024 - 1 Download
MD5: b81735d29cbd57664c1aa35bc37d267e
License: CC0 Creative Commons Zero 1.0
The catalogue contain the raw dielectric data for JK3 ferroelectric nematic enantiotropic material. The material 3JK, is composed of several chemical units of different nature, which, when combined appropriately, form an NF phase that exists over a wide temperature range and, most importantly, exhibits an enantiotropic character. The investigated material exhibits common chemical building units that can be categorized into three types: (1) aromatic mesogens with 2,5-substituted 1,3-dioxane groups (DIO analogue, (2) aromatic mesogens with an oriented ester bond (RM734 analogue; (3) aromatic mesogens with an electron-withdrawing fluorocarbon ether group, with additional fluorine atoms laterally substituted in aromatic rings. All these units are arranged sequentially in the same direction to create a controllable magnitude of molecular dipole moment. Dielectric spectra as a function of temperature and frequencies of the measuring field (frequencies from 10 to 1.3× 107 Hz). Dielectric spectra are in files with the extension data. The individual file denotes the measurement at a particular temperature, the first column contains the frequencies, the second the real permittivity, and the third the imaginary permittivity. These measurements were performed using two impedance network analysers, specifically the HP4I92A and HP4I95A. Data are for a homeotropic and planar aligned sample.
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